From 96d6da4e252b06dcfdc041e7df23e86161c33007 Mon Sep 17 00:00:00 2001 From: rihab kouki Date: Tue, 28 Jul 2020 11:24:49 +0100 Subject: Official ARM version: v5.6.0 --- DSP/Source/BasicMathFunctions/arm_mult_q31.c | 133 +++++++++++---------------- 1 file changed, 52 insertions(+), 81 deletions(-) (limited to 'DSP/Source/BasicMathFunctions/arm_mult_q31.c') diff --git a/DSP/Source/BasicMathFunctions/arm_mult_q31.c b/DSP/Source/BasicMathFunctions/arm_mult_q31.c index c302b01..9592684 100644 --- a/DSP/Source/BasicMathFunctions/arm_mult_q31.c +++ b/DSP/Source/BasicMathFunctions/arm_mult_q31.c @@ -3,13 +3,13 @@ * Title: arm_mult_q31.c * Description: Q31 vector multiplication * - * $Date: 27. January 2017 - * $Revision: V.1.5.1 + * $Date: 18. March 2019 + * $Revision: V1.6.0 * * Target Processor: Cortex-M cores * -------------------------------------------------------------------- */ /* - * Copyright (C) 2010-2017 ARM Limited or its affiliates. All rights reserved. + * Copyright (C) 2010-2019 ARM Limited or its affiliates. All rights reserved. * * SPDX-License-Identifier: Apache-2.0 * @@ -29,120 +29,91 @@ #include "arm_math.h" /** - * @ingroup groupMath + @ingroup groupMath */ /** - * @addtogroup BasicMult - * @{ + @addtogroup BasicMult + @{ */ /** - * @brief Q31 vector multiplication. - * @param[in] *pSrcA points to the first input vector - * @param[in] *pSrcB points to the second input vector - * @param[out] *pDst points to the output vector - * @param[in] blockSize number of samples in each vector - * @return none. - * - * Scaling and Overflow Behavior: - * \par - * The function uses saturating arithmetic. - * Results outside of the allowable Q31 range[0x80000000 0x7FFFFFFF] will be saturated. + @brief Q31 vector multiplication. + @param[in] pSrcA points to the first input vector. + @param[in] pSrcB points to the second input vector. + @param[out] pDst points to the output vector. + @param[in] blockSize number of samples in each vector. + @return none + + @par Scaling and Overflow Behavior + The function uses saturating arithmetic. + Results outside of the allowable Q31 range[0x80000000 0x7FFFFFFF] are saturated. */ void arm_mult_q31( - q31_t * pSrcA, - q31_t * pSrcB, - q31_t * pDst, - uint32_t blockSize) + const q31_t * pSrcA, + const q31_t * pSrcB, + q31_t * pDst, + uint32_t blockSize) { - uint32_t blkCnt; /* loop counters */ - -#if defined (ARM_MATH_DSP) + uint32_t blkCnt; /* Loop counter */ + q31_t out; /* Temporary output variable */ -/* Run the below code for Cortex-M4 and Cortex-M3 */ - q31_t inA1, inA2, inA3, inA4; /* temporary input variables */ - q31_t inB1, inB2, inB3, inB4; /* temporary input variables */ - q31_t out1, out2, out3, out4; /* temporary output variables */ +#if defined (ARM_MATH_LOOPUNROLL) - /* loop Unrolling */ + /* Loop unrolling: Compute 4 outputs at a time */ blkCnt = blockSize >> 2U; - /* First part of the processing with loop unrolling. Compute 4 outputs at a time. - ** a second loop below computes the remaining 1 to 3 samples. */ while (blkCnt > 0U) { /* C = A * B */ - /* Multiply the inputs and then store the results in the destination buffer. */ - inA1 = *pSrcA++; - inA2 = *pSrcA++; - inA3 = *pSrcA++; - inA4 = *pSrcA++; - inB1 = *pSrcB++; - inB2 = *pSrcB++; - inB3 = *pSrcB++; - inB4 = *pSrcB++; - - out1 = ((q63_t) inA1 * inB1) >> 32; - out2 = ((q63_t) inA2 * inB2) >> 32; - out3 = ((q63_t) inA3 * inB3) >> 32; - out4 = ((q63_t) inA4 * inB4) >> 32; - - out1 = __SSAT(out1, 31); - out2 = __SSAT(out2, 31); - out3 = __SSAT(out3, 31); - out4 = __SSAT(out4, 31); - - *pDst++ = out1 << 1U; - *pDst++ = out2 << 1U; - *pDst++ = out3 << 1U; - *pDst++ = out4 << 1U; - - /* Decrement the blockSize loop counter */ - blkCnt--; - } - /* If the blockSize is not a multiple of 4, compute any remaining output samples here. - ** No loop unrolling is used. */ - blkCnt = blockSize % 0x4U; + /* Multiply inputs and store result in destination buffer. */ + out = ((q63_t) *pSrcA++ * *pSrcB++) >> 32; + out = __SSAT(out, 31); + *pDst++ = out << 1U; - while (blkCnt > 0U) - { - /* C = A * B */ - /* Multiply the inputs and then store the results in the destination buffer. */ - inA1 = *pSrcA++; - inB1 = *pSrcB++; - out1 = ((q63_t) inA1 * inB1) >> 32; - out1 = __SSAT(out1, 31); - *pDst++ = out1 << 1U; - - /* Decrement the blockSize loop counter */ + out = ((q63_t) *pSrcA++ * *pSrcB++) >> 32; + out = __SSAT(out, 31); + *pDst++ = out << 1U; + + out = ((q63_t) *pSrcA++ * *pSrcB++) >> 32; + out = __SSAT(out, 31); + *pDst++ = out << 1U; + + out = ((q63_t) *pSrcA++ * *pSrcB++) >> 32; + out = __SSAT(out, 31); + *pDst++ = out << 1U; + + /* Decrement loop counter */ blkCnt--; } -#else + /* Loop unrolling: Compute remaining outputs */ + blkCnt = blockSize % 0x4U; - /* Run the below code for Cortex-M0 */ +#else /* Initialize blkCnt with number of samples */ blkCnt = blockSize; +#endif /* #if defined (ARM_MATH_LOOPUNROLL) */ while (blkCnt > 0U) { /* C = A * B */ - /* Multiply the inputs and then store the results in the destination buffer. */ - *pDst++ = - (q31_t) clip_q63_to_q31(((q63_t) (*pSrcA++) * (*pSrcB++)) >> 31); - /* Decrement the blockSize loop counter */ + /* Multiply inputs and store result in destination buffer. */ + out = ((q63_t) *pSrcA++ * *pSrcB++) >> 32; + out = __SSAT(out, 31); + *pDst++ = out << 1U; + + /* Decrement loop counter */ blkCnt--; } -#endif /* #if defined (ARM_MATH_DSP) */ } /** - * @} end of BasicMult group + @} end of BasicMult group */ -- cgit